Page 326 - Mechatronics with Experiments

JWST499-Cetinkunt
JWST499-c05
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0
1
Input 2
channels Output
3 channel
Multiplexer
4
5
6
7
A B C

FIGURE 5.44: Multiplexer circuit and its
function.

output terminals is as follows:
when S = 1 and R = 0, then Q = 1 (is “set” to the 1),

when S = 0 and R = 1, Q = 0 (is “reset” to 0).

When both S and R are 0, then the outputs do not change. The state of R and S both
being 1 is not allowed. If that occurs, outputs both go to 0. Basically, the output Q is set
(Q = 1) and reset (Q = 0) by S and R pulses.

JK-type Flip-Flop JK flip-flop is similar to RS flip-flop with only one difference: if
both inputs are 1 simultaneously, the outputs of JK reverse their states. The I/O transfer is

Inputs
Ch 1
AND
Ch 2
AND
Output
OR
Ch 3
AND
Ch 4
AND

AND AND AND AND

Multiplexer

A B
Chanel select
FIGURE 5.45: A multiplexer circuit for selecting one of four digital input channels. For
instance, digital code on channel select lines AB, selects the following channels: 00 select
channel 1, 01 selects channel 2, 10 selects channel 3, 11 selects channel 4.